...The presidential candidate endorsement game gets another player later today. We're hearing that Pennsylvania Congresswoman Allyson Schwartz of the 13th District will throw her lot in with Hillary Clinton. Schwartz would become the first Pennsylvania Democrat in Congress to play her presidential card. Republican Reps. Bill Shuster and Charlie Dent are the only other two to have endorsed candidates. Shuster, from the 9th District, is supporting Mitt Romney. Dent, from the 15th, chose Rudy Giuliani.What does it all mean? Not a heck of a lot. Some local headines, perhaps, but other than that political strategists say there's potentially more in it for the endorsers down the road, particularly if they get in the game early and, obviously, if their candidate wins.For Schwartz, the move makes sense. First off, there's that whole woman thing and Schwartz, being the lone female member of Pennsylvania's 21-member congressional delegation, knows a thing or two about female underrepresentation in Washington. Schwartz is a shrewd politician and has already begun her ascent through the party ranks. She is the only sophomore member on the Ways and Means Committee, perhaps the most powerful committee in the House because it sets tax policy. She's by no means one of the earliest members to commit to a candidate, but she stands to gain by jumping in while others wait for the primary to play out.